1,720,972 research outputs found
Biology and molecular character of turnip mosaic virus (TuMV) and detection method on caisin seeds (Brassica juncea L.)
No full textMosaic disease has been reported from vegetable field crops in Java recently is caused by VuTM is considered a new disease on caisin and tumip in Indonesia. The disease is able to spread rapidly and extensively because TuMV is transmitted by insect vectors or seeds
Chrysantheum B carlavirus (CVB) that infected Chrysanthemum in Indonesia: characterization and development of detection methode
No full textKrisan (Dendranthema grandiflora Kitam.) adalah salah satu jenis bunga yang banyak diminati oleh masyarakat dunia karena daya tarik warna, bentuk, dan ukurannya yang beranekaragam. Chrysanthemum B Carlavirus (CVB) adalah virus utama yang menginfeksi krisan dan dilaporkan telah tersebar pada pertanaman krisan di berbagai negara. Infeksi CVB pada tanaman krisan menyebabkan gejala belang atau pemucatan tulang daun yang sangat ringan pada daun, serta penurunan kualitas bunga. Namun demikian lebih sering kultivar yang terinfeksi virus ini tidak menunjukkan gejala (symptomless).Infection of chrysantheum B carlavirus (CVB) in chrysanthemum has reported from many countries where the plants were cultivated. In a survey of chrysanthemum growing fields (and greenhouse) in Cianjur regency, West Java, Indonesia, some chrysanthemum cultivars exhibited a variety of symptoms ranging from mild mottle, vein-clearing and mild mosaic of leaves; and color breaking of flowers
Study of entomopathogenic fungus Metarhizium brunneum Petch as biocontrol agent against Macrotermes gilvus hagen (Isoptera: Termitidae) in castor (Jatropha curcas L.) plantantion
No full textMacrotermes gilvus Hagen is primary pest of castor (Jatropha curcas L.), as the termites can damage roots and stems. The purposes of this research were: (1) to estimate population size of colony in field stations at KIJP Pakuwon, (2) to study M. gilvus foraging range, (3) to study the symptomatology and lethal time of M. brunneum as biocontrol agent to M. gilvus in the laboratory, (4) to study the effectiveness of the M. brunneum Petch as biological control agents against M. gilvus in KIJP Pakuwon. The study was conducted from November 2009 to October 2010 in the insect pathology laboratory and insect taxonomy laboratory Departement of Plant Protection, Bogor Agricultural University (IPB), Zoology Laboratory LIPI Cibinong and in the KIJP Pakuwon. Laboratory test was designed using Completely Randomized Design (CRD) and the data were subject to probit analysis. Triple mark recapture methods were used to estimate termite population in the field. In the laboratorium the effective density of conidia as biotermiticide was 1,21x106 konidia/mL, and this led to mortality of M. gilvus up to 85,45%, while the density of 1,08x106conidia/mL resulting in mortality of 78,63%. The suspension of fungi at density 1,21x106conidia/mL was poured at each experimental station (150 mL/station). The result showed that in block I (15.210 m2), block II (5.700 m2), block III (27.000 m2), 8, 1 and 15 termite colonies have been detected respectively from which, 150.388, 59.219, and 149.459 individus were found. In block I, the termites maximum foraging range as far as 140,5 m, as compared to 140 m in block III. In all blocks, we noted the significant decrease of termite population after application of M. brunneum, from initial population 359.066 individus to 15.015 individusRayap Macrotermes gilvus Hagen merupakan salah satuhama penting tanaman jarak pagar yang merusak sistem perakaran pada pangkal batang tanaman, dan mengakibatkan tanaman terluka, patah dan akhirnya mati. Serangan hama ini semakin lama semakin meningkat hingga meluas pada tanaman sehat lainnya.Selama ini pengendalian rayap di KIJP Pakuwon dilakukan dengan menggunakan insektisida yang disiramkan disekitar perakaran tanaman yang dapat menimbulkan dampak negatif terhadap lingkungan.Oleh karena itudiperlukancarapengendalian lain yang ramah lingkungandengan memanfaatkan agens hayati. Cendawan entomopatogen Metarhizium brunneum mempunyai patogenisitas lebih tinggi dibandingkan beberapa cendawan entomopatogen lainuntuk mengendalikan hama ordo Isoptera. Informasi mengenai pemanfaatan cendawan M. brunneum sebagai agens biokontrol yang berpotensi terhadap hama rayap M. gilvuspada tanaman jarak pagar belum pernah dilaporkan. Penelitian ini bertujuan: (1) Menduga ukuran populasi koloni rayap M. gilvus dari setiap koloni pada stasiun pengamatan di KIJP Pakuwon, (2) Mempelajari daya jelajah rayap M.gilvus di KIJP Pakuwon, (3) Mempelajari simtomatologi dan waktu kematian rayap M. gilvussetelah diinfeksi oleh cendawan M. brunneum sebagai biotermitisida di laboratorium, (3) Mempelajari keefektifan cendawan M. brunneum sebagai agens biokontrol terhadap hama rayap M. gilvuspada tanaman jarak pagar di KIJP Pakuwon.Penelitian ini dilakukan di laboratorium Patologi Serangga, Laboratorium Taxonomi Serangga Departemen Proteksi Tanaman, Faperta IPB, Laboratorium Zoologi LIPI Cibinong dan di Kebun Induk Jarak Pagar (KIJP) Pakuwon Sukabumi Jawa Barat,sejak bulanNopember 2009 sampai Oktober 2010. Rancangan acak lengkap (RAL) digunakan untuk penelitian laboratorium sedangkan metode triple mark recapture technique untuk penelitian di lapangan
Bioecology of parasitic moth (Lepidoptera: Epipyropidae) on cashew shoothoppers, Sanurus spp. (Hemiptera: Flatidae) in Lombok island cashew plantation
Get PDFNgengat parasitoid Epipyropidae merupakan salah satu famili dari ordo Lepidoptera yang memarasit hama dari ordo Homoptera superfamili Fulgoroidea. Ngengat parasitoid ini baru dilaporkan pertama kalinya menyerang WPM (Sanurus), sehingga informasi tentang biologi dan ekologi-nya sangat kurang. Penelitian ini bertujuan untuk mempelajari karakteristik morfologi dari ngengat parasitoid beserta inangnya, biologi (mencakup perkembangan, siklus hidup, perilaku, preferensi inang dan habitat), dan ekologi (mencakup distribusi, kelimpahan dan dinamika populasi) spesies ektoparasitoid famili Epipyropidae yang berasosiasi dengan hama WPM (Sanurus) yang ada di pertanaman jambu mete pulau Lombok. Penelitian ini terdiri dari empat tahapan penelitian yaitu : (1) identifikasi dan karakter ngengat parasitoid (Lepidoptera: Epipyropidae) dan wereng pucuk mete (Hemiptera: Flatidae); (2) biologi ngengat parasitoid (Lepidoptera: Epipyropidae) yang berasosiasi dengan wereng pucuk mete (Hemiptera: Flatidae) di pertanaman jambu mete pulau Lombok; (3) preferensi habitat dan inang; dan (4) fluktuasi populasi Epiuerybrachys nsp. yang berasosiasi dengan wereng pucuk mete di pertanaman jambu mete pulau Lombok.A species of parasitic moth has been found in cashew plantations in Lombok island. The moth belongs to the family Epipyrodae, order Lepidoptera, and the larvae live as ectoparasitoids of cashew shoothoppers, Sanurus spp. (Hemiptera: Flatidae). Information on this rare parasitoid so far is very limited
Kompatibilitas Parasitoid Eriborusargenteopilosus Cameron (Hymeoptera:Ichneumonidae) dan Inangnya: Faktor-Faktor yang Mempengaruhi Efektivitas Eriborus Argenteopilosus dalam Mengendalikan Crocidolomia Pavonana Fabricus (Lepidoptera: Pyralidae)
Get PDFEriborus argenteopilosus merupakan parasitoid paling berpotensi untuk digunakan sebagai agens pengendalian hayati Crocidolomia pavonana. Penelitian untuk melihat kompatibilitas parasitoid Eriborus argenteopilosus dan inangnya dalam kaitannya dengan faktor-faktor yang mempengaruhi efektivitasnya dalam mengendalian C. pavonana telah diteliti di laboratorium selama dua tahun (2002 dan 2003). Tujuan penelitian ini adalah (1) untuk mempelajari aspek kesesuaian tiga jenis inang bagi perkembangan parasitoid, (2) mempelajari kebugaran dan pergeseran preferensi parasitoid yang dihasilkan dari tiga jenis inang, (3) mempelajari fenomena multiparasitisme dalam hubungannya dengan perilaku diskriminasi inang, kompetisi interspesifik, dan enkapsulasi, dan (4) mempelajari tanggap reproduksi parasitoid yang dikondisikan dalam ketiadaan inang
POTENTIAL ROLE OF WILD CRUCIFERS IN THE PRESERVATION OF DIADEGMA EUCEROPHAGA HORSTMAN (HYMENOPTERA: ICHNEUMONIDAE), A PARASITOID OF THE DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA LINNAEUS (LEPIDOPTERA: PLUTELLIDAE)
Get PDFLaboratory and field experiments were conducted to evaluate the potential role of two species of wild crucifers in the preservation of Diadegma eucerophaga Horstman, a parasitoid of the diamondback moth, Plutella xylostella Linnaeus. In the laboratory, D. eucerophaga developed quite well on P. xylostella larvae fed on leaves of two species of wild cruciferous plants, Nasturtium heterophyllum BL. and Cardamine hirsuta L. These wild crucifers may serve as food and oviposition sites for P. xylostella. In the field, N. heterophyllum and C. hirsuta planted adjacent to insecticide-treated cabbage plots provided refuge for D. eucerophaga parasitoids
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
- …
